/*
 Copyright  2002-2004 MySQL AB, 2008 Sun Microsystems
 All rights reserved. Use is subject to license terms.

  The MySQL Connector/J is licensed under the terms of the GPL,
  like most MySQL Connectors. There are special exceptions to the
  terms and conditions of the GPL as it is applied to this software,
  see the FLOSS License Exception available on mysql.com.

  This program is free software; you can redistribute it and/or
  modify it under the terms of the GNU General Public License as
  published by the Free Software Foundation; version 2 of the
  License.

  This program is distributed in the hope that it will be useful,  
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  02110-1301 USA



 */
package com.mysql.jdbc.log;

/**
 * Unified interface to logging facilities on different platforms
 * 
 * @author Mark Matthews
 * 
 * @version $Id$
 */
public interface Log {
	/**
	 * Is the 'debug' log level enabled?
	 * 
	 * @return true if so.
	 */
	boolean isDebugEnabled();

	/**
	 * Is the 'error' log level enabled?
	 * 
	 * @return true if so.
	 */
	boolean isErrorEnabled();

	/**
	 * Is the 'fatal' log level enabled?
	 * 
	 * @return true if so.
	 */
	boolean isFatalEnabled();

	/**
	 * Is the 'info' log level enabled?
	 * 
	 * @return true if so.
	 */
	boolean isInfoEnabled();

	/**
	 * Is the 'trace' log level enabled?
	 * 
	 * @return true if so.
	 */
	boolean isTraceEnabled();

	/**
	 * Is the 'warn' log level enabled?
	 * 
	 * @return true if so.
	 */
	boolean isWarnEnabled();

	/**
	 * Logs the given message instance using the 'debug' level
	 * 
	 * @param msg
	 *            the message to log
	 */
	void logDebug(Object msg);

	/**
	 * Logs the given message and Throwable at the 'debug' level.
	 * 
	 * @param msg
	 *            the message to log
	 * @param thrown
	 *            the throwable to log (may be null)
	 */
	void logDebug(Object msg, Throwable thrown);

	/**
	 * Logs the given message instance using the 'error' level
	 * 
	 * @param msg
	 *            the message to log
	 */
	void logError(Object msg);

	/**
	 * Logs the given message and Throwable at the 'error' level.
	 * 
	 * @param msg
	 *            the message to log
	 * @param thrown
	 *            the throwable to log (may be null)
	 */
	void logError(Object msg, Throwable thrown);

	/**
	 * Logs the given message instance using the 'fatal' level
	 * 
	 * @param msg
	 *            the message to log
	 */
	void logFatal(Object msg);

	/**
	 * Logs the given message and Throwable at the 'fatal' level.
	 * 
	 * @param msg
	 *            the message to log
	 * @param thrown
	 *            the throwable to log (may be null)
	 */
	void logFatal(Object msg, Throwable thrown);

	/**
	 * Logs the given message instance using the 'info' level
	 * 
	 * @param msg
	 *            the message to log
	 */
	void logInfo(Object msg);

	/**
	 * Logs the given message and Throwable at the 'info' level.
	 * 
	 * @param msg
	 *            the message to log
	 * @param thrown
	 *            the throwable to log (may be null)
	 */
	void logInfo(Object msg, Throwable thrown);

	/**
	 * Logs the given message instance using the 'trace' level
	 * 
	 * @param msg
	 *            the message to log
	 */
	void logTrace(Object msg);

	/**
	 * Logs the given message and Throwable at the 'trace' level.
	 * 
	 * @param msg
	 *            the message to log
	 * @param thrown
	 *            the throwable to log (may be null)
	 */
	void logTrace(Object msg, Throwable thrown);

	/**
	 * Logs the given message instance using the 'warn' level
	 * 
	 * @param msg
	 *            the message to log
	 */
	void logWarn(Object msg);

	/**
	 * Logs the given message and Throwable at the 'warn' level.
	 * 
	 * @param msg
	 *            the message to log
	 * @param thrown
	 *            the throwable to log (may be null)
	 */
	void logWarn(Object msg, Throwable thrown);
}